Edwards, H. C., & Penney, D. E. (2000). Elementary differential equations with boundary value problems (4η έκδ.). Upper Saddle River, NJ: Prentice Hall.
Παραπομπή Chicago StyleEdwards, Henry C., and David E. Penney. Elementary Differential Equations With Boundary Value Problems. 4η έκδ. Upper Saddle River, NJ: Prentice Hall, 2000.
Παραπομπή MLAEdwards, Henry C., and David E. Penney. Elementary Differential Equations With Boundary Value Problems. 4η έκδ. Upper Saddle River, NJ: Prentice Hall, 2000.
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